浸水前后花岗岩与混凝土滑动摩擦系数取值探讨OA
Investigation on the Sliding Friction Coefficient of Granite and Concrete before and after Water Immersion
某跨海桥梁项目主桥锚碇为海中锚碇,基底持力层为全风化花岗岩及砂土状强风化花岗岩.该地层存在遇水崩解软化特性,在锚碇设计时,需要充分考虑遇水软化后的沉井基础与基岩的水平摩擦系数,以确定锚碇规模.采用类似项目取值、规范建议取值、抗剪强度指标反算、现场测试等多手段论证了浸水前后全风化及砂土状强风化花岗岩与混凝土之间的摩擦系数.结果表明:天然状态下全风化花岗岩摩擦系数为 0.25,砂土状强风化花岗岩摩擦系数为0.50,浸水状态下全风化花岗岩摩擦系数为0.22,强风化花岗岩摩擦系数为0.34.
The main bridge anchorage of a cross-sea bridge project was an offshore anchorage,with the foundation bearing layer consisting of completely weathered granite and sandy strongly weathered granite.This stratum exhibited the characteristics of disintegration and softening upon water contact.In the design of the anchorage,the horizontal friction coefficient between the caisson foundation and the bedrock after water softening must be fully considered to determine the anchorage scale.Multiple methods were used to verify the friction coefficient between the completely weathered granite,sandy strongly weathered granite,and concrete before and after immersion,including reference to similar project values,code-recommended values,back-calculation of shear strength parameters,and field tests.The results show that:the friction coefficient of completely weathered granite is 0.25 in its natural state and 0.22 after immersion,while that of sandy strongly weathered granite is 0.50 in its natural state and 0.34 after immersion.
孙治国;马骏;张雪东
中交公路规划设计院有限公司,北京 100088北京特种工程设计研究院,北京 100028中交铁道设计研究总院有限责任公司,北京 100088
建筑与水利
海中锚碇全/强风化花岗岩持力层水下开挖浸水摩擦系数易位测试
offshore anchorcompletely/strongly weathered granitebearing stratumunderwater excavationimmersionfriction coefficienttranssituation test
《路基工程》 2026 (1)
99-105,7
2025年科技服务业企业效能提升科研项目(20250467476)
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